US Patent Issued to Halliburton Energy Services on April 14 for "Debris collection device with passive check valve" (Texas Inventors)

ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,247, issued on April 14, was assigned to Halliburton Energy Services Inc. (Houston).

"Debris collection device with passive check valve" was invented by Pramod Chamarthy (Carrollton, Texas), Wei Zhang (Houston) and Rodney Marlow (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variety of methods and apparatus are disclosed, including, in one embodiment, a bailer to collect debris from a wellbore, the bailer including a passive check valve to provide preferential flow through an annular path over a central path of the bailer with the flow of debris-laden fluid and filtered fluid in an uphole direction through the bailer and provide preferen...